log pid when there is a problem reading the process stats (#1341)

Signed-off-by: Paul Gier <pgier@redhat.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/collector/processes_linux.go b/collector/processes_linux.go
index 1ee012e..9b171ac 100644
--- a/collector/processes_linux.go
+++ b/collector/processes_linux.go
@@ -108,10 +108,11 @@ func (c *processCollector) getAllocatedThreads() (int, map[string]int32, int, er
                 stat, err := pid.NewStat()
                 // PIDs can vanish between getting the list and getting stats.
                 if os.IsNotExist(err) {
-                        log.Debugf("file not found when retrieving stats: %q", err)
+                        log.Debugf("file not found when retrieving stats for pid %v: %q", pid, err)
                         continue
                 }
                 if err != nil {
+                        log.Debugf("error reading stat for pid %v: %q", pid, err)
                         return 0, nil, 0, err
                 }
                 pids++